Light bulb or portion thereof



FIG. 1 is a front, top perspective view of a light bulb or portion thereof;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a right-side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict portions of the light bulb or portion thereof that form no part of the claimed design. 

CLAIM The ornamental design for a light bulb or portion thereof, as shown and described. 